Window-lifter.



No. 815,914. PATENTED MAR. 20, 1906.

N. REVANS."

-, WINDOW LIFTER.

APPLICATION-FILED MAR. 17, 1905,

. NEWTON 15. Emma. I W1 VE -E j ZVVENTOR. iayk/y By transom,,&c.,lifters.

' UNITED STATES PATENT OFFICE. Y 1 NEWTQN'R. EvANs, or RIOHMOND,1NDIANA, lissieuoaro oHN A. II'EVANS, or RICHMOND, INDIANA. 1

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I. Specification of Letters Patent. Application filcd march 17. 1905. Serial No. 250.588.

Patented march 20, 1906..

To all whom it may concern: 4

Be it known that I, NEWTON R. Evans, a citizen of the United States, residing at-Rich- I m'ond,in the county of Wayne and State of 5'Ind1ana, have invented -ertain new and usesuch as willenable others skilled in the art to which it 'appertains to make and use the same. I I

My invention relates to window, skylight, Its object is to provide a device for raising or lowering windows, ven tilators, and similar structures which shall apply the power in the same directions but from different fulcrulns and shall be composed of parts readily assembled 'and dismemberedand so sim le in construction that any part and particu arly the fulcrum block or rib may bemade at a small cost, and there foreeasilyreplaeed in case of breaka e.

In the drawings, Figure 1 is a si e eleva tion with the operation of the parts indicated. Fig. 2- is a detail side elevation. Fig. 3 is a plan or top view of the detail shown in Fig. '2. v Fig. 4 is a detail of a modified construction, and Fig. 5 is aplan or top view of the detail construction of Fig. 4. I 1 re resents a wall, sill,'door, beam, or gable. n this case the illustration maybe, for

eziamfple, supposed to represent the ventila-- a greenhouse, 2 representing the'frame tor o and 3 the usual bracket-support.

f4. represents-a hinged ventilator to be op erated'by my lifter.

5 is a pipe-shaft which may have an operatingrgear or lever at one or both ends. A cap-sleeve 6 bears upon the pipe-shaft and opposed to it is a block 7, which is removably secured in the example illustrated by bolts to the capfsleeve 6; The block 7 is shown in 'two forms and may be variously modified within t essential princi les of theinven tion, as herein set forth. n the form shown in Figs. 2 and 3 the block is U-shaped in cross-section, while in the form shown in Figs. 4 and 5 it'i L-shaped.

8 is a cglnnecting-arm pivoted tothe venoted toit at different points and on opposite the form shown in tilator an a t-the opposite end having'pivo eration ofthe' device the connecting-arm s ould be pivoted to the object-to be lifted and to the two links at points on opposite sides of its center. I haveshown the arms 9- and 10 as pivoted at op osite ends of theblock but it is within -t edprinciple of my invention to pivot these at ifierent points, whether respectively at each end or not. In

13 of the block 7, while in the form shown in Figs. 4 and 5 the arms are pivoted to the rib 11 and on op osit-e sides thereof. When the power is app ied through the pipe-shaft 5, it is communicated to the connecting-arm 8 through the links 9 and 10, so that a swin ing and lifting movement isi'mparted. n the illustration of Fig. 1, for example, the link 9. is shown as the inner arm pivoted at the upper end of the rib of the block, while the lin' 10 is shown as pivoted to the lower I igs. 2' and 3 the'arms 9 and 10 are pivoted between the ribs 12 and end of the block 7 and the other end of the.

arm 8. As the block 7 turns on the shaft-5 the arm 9 pushes down'on the "arm 8, While the outer arm 10 pulls on the arm 8, so that the pivotal connection of the link 10 with the arm 8 moves farther away, while the pivotal connection of the link 9 with the arm 8 moves nearer to the pivotal point of the shaft 5. By this means I secured a peculiar twisting or what is an equivalent of an eccentric action, so that I have combined inthis device a lifting and pulling efiect, whereby thewhole movement of the ventilator. is made with the minimum application of power and with no possibility of a dead-center.

claim 1. In a. window or other lifter, the combination of a rotatable fulcrum or carrying block, a pair of links pivoted at different points to the block, and a'connecting-arm' to 9 Having fully described my invention, I

too

nation of an operating-shaft, a cap-sleeve, a

fulcrum or carrying block having.a(project ing rib, a pair of links pivoted at lfl erent points on the rib and a connectlng-arm to which the links are pivoted at different.

points.

3. In a window orother lifter, thecombiarable attaching device comprising a ribbed.

power-block, a sleeve-cap, and an 0 eratingshaft upon which they are journaled i in In a window or other lifter, the combination'ofoperatin means, a rotatable fulcrum or carrying block, and means comprising a connecting-arm and two shorter arms or links, the two shorter arms or linksbeing pivoted to a connecting-arm at one side of its center, the said arm being pivoted at a point on the'other side of its center to the object to be lifted.

5. In a window or other lifter, the combination of operatin means a carrying or rotatable fulcrum-bloc and means comprising a connecting arm and two shorter links or arms, the shorter links being pivoted to o posite sides of the carrying or fulcrum bloc at different points, and also pivoted to opposite sides of'a connecting-arm at one side of its center.

center, the said arm being pivoted at a'point on the other side of its center to the object to be lifted.

6. In a window or other lifter, the combination with a connecting-arm and a rotatable fulcrum or carrying block, of two links pivoted to the fulcrum-block and a connectingarm, and operating upon the connecting-arm, one of the links exerting a pushing action upon the arm While the other link exerts a pull upon the arm the said connectin -arm being pivoted to the object to be lifte and to the two linksat points on opposite sides of its In testimony whereof I afiix my signature in presence of two witnesses.

NEWTON R. EVANS. 

